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U11 Glass Bulb for CdS Photoresistor

The U11 glass bulb is a dedicated dome-top sealing housing for CdS photoresistors. Fabricated from UV-cut borosilicate sealing glass, this component efficiently blocks ultraviolet light below 380nm while maintaining stable transmittance across the visible spectrum. Its thermal expansion coefficient is well-matched to Dumet wire to enable reliable hermetic sealing, protecting internal CdS chips from oxidation and performance deterioration. This glass shell is widely adopted as a standard encapsulation component for outdoor light dependent resistors.

    Feature

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    This glass bulb features built-in ultraviolet filtering capability, minimizing CdS chip resistance drift triggered by UV exposure and extending the service life of outdoor devices. Its optimized thermal expansion characteristic enables stable airtight fusion sealing with Dumet lead wires. It maintains uniform visible light transmittance with spectral response closely aligned with the human eye vision curve. Precise dimensional consistency guarantees stable batch quality and seamless operation on automated encapsulation production lines. The integrated dome-end structure provides solid mechanical strength and dependable physical protection for internal photosensitive chips.

    Application

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    This product functions as the encapsulation shell for CdS light dependent resistors. It is extensively applied in outdoor light sensor modules and automatic streetlight switching systems. It is also suitable for lighting automation equipment and photometric testing devices subjected to prolonged sunlight exposure.

      Available Size

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      Parameter

      Value

      Diameter

      5mm

      Wall Thickness

      0.4mm

      Length

      16.5mm

      OEM is acceptable